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Large Eddy Simulation of the Compressible Flow Over an Open Cavity

Oh, Keon-Je and Colonius, Tim (2002) Large Eddy Simulation of the Compressible Flow Over an Open Cavity. In: ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. Volume 1: Fora, Parts A and B. American Society of Mechanical Engineers , New York, NY, pp. 1173-1178. ISBN 0791836150.

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Large eddy simulation is used to investigate the compressible flow over a open cavity. The sub-grid scale stresses are modeled using the dynamic model. The compressible Navier-Stokes equations are solved with the sixth order accurate compact finite difference scheme in the space and the 4th order Runge-Kutta scheme in the time. The buffer zone techniques are used for non-reflecting boundary conditions. The results show a typical flow pattern of the shear layer mode of oscillation over the cavity. The votical disturbances, the roll-up of vorticity, and impingement and scattering of vorticity at the downstream cavity edge can be seen in the shear layer, while the flow inside the cavity is relatively quiescent. The predicted acoustic resonant frequencies are in good agreement with those of the empirical formula. The mean flow streamlines are nearly horizontal along the mouth of the cavity. The pressure has its minimum value in the vortex core inside the cavity. The variation of the model coefficient predicted by the dynamic model is quite large between 0 and 0.3. The model coefficient increases in the stream-wise evolution of the shear layer and sharply decreases near the wall due to the wall effect.

Item Type:Book Section
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Colonius, Tim0000-0003-0326-3909
Additional Information:© 2002 American Society of Mechanical Engineers.
Subject Keywords:Cavities, Compressible flow, Large eddy simulation
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Record Number:CaltechAUTHORS:20190709-092102590
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Official Citation:Oh K, Colonius T. Large Eddy Simulation of the Compressible Flow Over an Open Cavity. ASME. Fluids Engineering Division Summer Meeting, Volume 1: Fora, Parts A and B ():1173-1178. doi:10.1115/FEDSM2002-31352.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96982
Deposited By: Melissa Ray
Deposited On:12 Jul 2019 16:58
Last Modified:16 Nov 2021 17:25

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